Mark D Peterson1, Paul M Gordon2, Sonja Smeding3, Paul Visich4. 1. Department of Physical Medicine & Rehabilitation, University of Michigan, Ann Arbor, MI. 2. Department of Health, Human Performance and Recreation, Baylor University, Waco, TX. Electronic address: Paul_M_Gordon@baylor.edu. 3. Department of Health, Human Performance and Recreation, Baylor University, Waco, TX. 4. Department of Exercise and Sport Performance, University of New England, Biddeford, ME.
Abstract
OBJECTIVE: To assess the effects of muscle strength, as determined by grip strength, on changes in health status in adolescents. STUDY DESIGN: Risk variables included excess body fat, elevated fasting glucose, high blood pressure, elevated serum triglycerides, and low high-density lipoprotein cholesterol. Multinomial logistic regression was used to quantify the odds of experiencing health maintenance (no risk factors identified at either time point) or health improvement (presence of ≥1 baseline risk factor and fewer or no risk factors at follow-up) over a 2-year period. The primary exposure variable was grip strength normalized by body mass (normalized grip strength [NGS]), and previous cut-offs were used to determine whether adolescents were weak or strong. RESULTS: Adolescents who had low NGSs had a significantly greater prevalence of health decline or poor health persistence as compared with those who were strong (boys: 60.2% vs 15.3%; girls: 51% vs 21.9%; all P < .001). Moreover, adolescents who were strong had an increased adjusted odds for health maintenance (OR 3.54; 95% CI 1.80-6.97) and health improvement (OR 1.30; 95% CI 1.05-1.60), even after we adjusted for baseline fat-free mass index, cardiorespiratory fitness, and objectively measured physical activity. CONCLUSIONS: Greater NGS is associated with longitudinal health maintenance and health improvements in adolescents. Low NGS could be used as a prognostic indicator of cardiometabolic risk and to identify adolescents who would benefit most from lifestyle interventions to improve muscular fitness.
OBJECTIVE: To assess the effects of muscle strength, as determined by grip strength, on changes in health status in adolescents. STUDY DESIGN: Risk variables included excess body fat, elevated fasting glucose, high blood pressure, elevated serum triglycerides, and low high-density lipoprotein cholesterol. Multinomial logistic regression was used to quantify the odds of experiencing health maintenance (no risk factors identified at either time point) or health improvement (presence of ≥1 baseline risk factor and fewer or no risk factors at follow-up) over a 2-year period. The primary exposure variable was grip strength normalized by body mass (normalized grip strength [NGS]), and previous cut-offs were used to determine whether adolescents were weak or strong. RESULTS: Adolescents who had low NGSs had a significantly greater prevalence of health decline or poor health persistence as compared with those who were strong (boys: 60.2% vs 15.3%; girls: 51% vs 21.9%; all P < .001). Moreover, adolescents who were strong had an increased adjusted odds for health maintenance (OR 3.54; 95% CI 1.80-6.97) and health improvement (OR 1.30; 95% CI 1.05-1.60), even after we adjusted for baseline fat-free mass index, cardiorespiratory fitness, and objectively measured physical activity. CONCLUSIONS: Greater NGS is associated with longitudinal health maintenance and health improvements in adolescents. Low NGS could be used as a prognostic indicator of cardiometabolic risk and to identify adolescents who would benefit most from lifestyle interventions to improve muscular fitness.
Authors: Grant R Tomkinson; Tori Kaster; Faith L Dooley; John S Fitzgerald; Madison Annandale; Katia Ferrar; Justin J Lang; Jordan J Smith Journal: Sports Med Date: 2021-03 Impact factor: 11.136
Authors: Gabrielle A Donlevy; Sarah P Garnett; Kayla M D Cornett; Marnee J McKay; Jennifer N Baldwin; Rosemary R Shy; Sabrina W Yum; Timothy Estilow; Isabella Moroni; Maria Foscan; Emanuela Pagliano; Davide Pareyson; Matilde Laura; Trupti Bhandari; Francesco Muntoni; Mary M Reilly; Richard S Finkel; Janet E Sowden; Katy J Eichinger; David N Herrmann; Michael E Shy; Joshua Burns; Manoj P Menezes Journal: Neurology Date: 2021-09-07 Impact factor: 9.910